Hi Kelly,
Thank you for the prompt reply, but there's a few issues with it for me unfortunately.
Firstly I'm not getting any 3 dot menu in the top-right corner of the Reminders app. I'm using an iPad mini running IoS 12.5.7. A quick look at the Apple user forum seems to suggest the inability to export Reminders tasks is a long running issue. https://discussions.apple.com/thread/250646596?answerId=251357986022#251357986022
Here's a screenshot of Reminders on my iPad mini.
I've also looked at Reminders on iCloud & again can't see any way of exporting my tasks (screenshot attached, selecting 'Options' only allows a change of background colour.
Secondly, even if I can somehow get to export the Reminders I'm struggling to find whereabouts in the To Do app there is an "Import" option.
I should have added that I'm using a Surface Pro 9 which runs Windows 11, does this make a difference? I've attached a couple of screenshots; apologies in advance if I'm missing something very obvious but I'm afraid I just can't see whereabouts the "Import" option is.